This paper introduces Professor SUN Guizhi’ s experience in treating primary hepatic carcinoma. The main treating method of liver cancer is benefiting Qi and activating blood

softening hard mass and clearing away toxic matters. The principle of "tonifying the spleen and stomach"

and "preventing disease"are important. The vital function of spleen and stomach was emphasized in the occurrence and development of liver cancer. Professor SUN also advocates early intervention in the phases of liver fibrosis and liver cirrhosis to prevent occurrence of liver cancer; as well as active intervention after occurrence of liver cancer to prevent recurrence and metastasis.